drm/i915/uncore: split unclaimed_reg_debug() to header and footer

Make it easier to have different logic for the two for follow-up.

Cc: Lee Shawn C <shawn.c.lee@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8a0a93f08314f8d7e222a907d9aa5e0b89cb969e.1690886109.git.jani.nikula@intel.com

drivers/gpu/drm/i915/intel_uncore.c

@@ -1926,10 +1926,8 @@ __unclaimed_previous_reg_debug(struct intel_uncore *uncore,
 }
 
 static inline void
-unclaimed_reg_debug(struct intel_uncore *uncore,
-		    const i915_reg_t reg,
-		    const bool read,
-		    const bool before)
+unclaimed_reg_debug_header(struct intel_uncore *uncore,
+			   const i915_reg_t reg, const bool read)
 {
 	if (likely(!uncore->i915->params.mmio_debug) || !uncore->debug)
 		return;
@@ -1937,13 +1935,22 @@ unclaimed_reg_debug(struct intel_uncore *uncore,
 	/* interrupts are disabled and re-enabled around uncore->lock usage */
 	lockdep_assert_held(&uncore->lock);
 
-	if (before) {
-		spin_lock(&uncore->debug->lock);
-		__unclaimed_previous_reg_debug(uncore, reg, read);
-	} else {
-		__unclaimed_reg_debug(uncore, reg, read);
-		spin_unlock(&uncore->debug->lock);
-	}
+	spin_lock(&uncore->debug->lock);
+	__unclaimed_previous_reg_debug(uncore, reg, read);
+}
+
+static inline void
+unclaimed_reg_debug_footer(struct intel_uncore *uncore,
+			   const i915_reg_t reg, const bool read)
+{
+	if (likely(!uncore->i915->params.mmio_debug) || !uncore->debug)
+		return;
+
+	/* interrupts are disabled and re-enabled around uncore->lock usage */
+	lockdep_assert_held(&uncore->lock);
+
+	__unclaimed_reg_debug(uncore, reg, read);
+	spin_unlock(&uncore->debug->lock);
 }
 
 #define __vgpu_read(x) \
@@ -2004,10 +2011,10 @@ __gen2_read(64)
 	u##x val = 0; \
 	assert_rpm_wakelock_held(uncore->rpm); \
 	spin_lock_irqsave(&uncore->lock, irqflags); \
-	unclaimed_reg_debug(uncore, reg, true, true)
+	unclaimed_reg_debug_header(uncore, reg, true)
 
 #define GEN6_READ_FOOTER \
-	unclaimed_reg_debug(uncore, reg, true, false); \
+	unclaimed_reg_debug_footer(uncore, reg, true); \
 	spin_unlock_irqrestore(&uncore->lock, irqflags); \
 	trace_i915_reg_rw(false, reg, val, sizeof(val), trace); \
 	return val
@@ -2108,10 +2115,10 @@ __gen2_write(32)
 	trace_i915_reg_rw(true, reg, val, sizeof(val), trace); \
 	assert_rpm_wakelock_held(uncore->rpm); \
 	spin_lock_irqsave(&uncore->lock, irqflags); \
-	unclaimed_reg_debug(uncore, reg, false, true)
+	unclaimed_reg_debug_header(uncore, reg, false)
 
 #define GEN6_WRITE_FOOTER \
-	unclaimed_reg_debug(uncore, reg, false, false); \
+	unclaimed_reg_debug_footer(uncore, reg, false); \
 	spin_unlock_irqrestore(&uncore->lock, irqflags)
 
 #define __gen6_write(x) \